Pratik kamble: Created page with "{| border="1" |- | '''Time''' | '''Narration''' |- | 00:02 | Welcome to the spoken tutorial on creating new '''commands '''in '''LaTeX'''. |- | 00:08 |This tutorial will hel..."

2021-06-28T13:33:47Z

Created page with "{| border="1" |- | '''Time''' | '''Narration''' |- | 00:02 | Welcome to the spoken tutorial on creating new '''commands '''in '''LaTeX'''. |- | 00:08 |This tutorial will hel..."

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{| border="1"
|-
| '''Time'''
| '''Narration'''

|-
| 00:02
| Welcome to the spoken tutorial on creating new '''commands '''in '''LaTeX'''.

|-
| 00:08
|This tutorial will help the learners to

create or define new '''commands''' to get customized output.

redefine the existing '''commands'''.

|-
| 00:18
| To follow this tutorial,

1 You should have knowledge of '''commands '''that are necessary to create a document in '''LaTeX'''.
2 You should also have knowledge of '''compiling '''and producing a '''PDF output '''in '''LaTeX'''.
3 If not, please go through the relevant '''LaTeX''' spoken tutorials on this website.

|-
| 00:37
| To record this tutorial, I am using

'''Ubuntu Linux 14.04''' operating system

'''TeXWorks 0.5'''

|-
| 00:47
| We all know that '''commands '''are special words that are provided to the '''compiler'''.

|-
| 00:52
|'''Commands '''start with a '''backslash '''and sometimes accept '''parameters'''.
Example: '''\noindent, \textbf, \centering'''

|-
| 01:02
|We can define our own custom '''commands '''in '''LaTeX''' to save time or for the code to look cleaner.

|-
| 01:09
| Ensure that the custom '''command '''you create is not an already existing '''LaTeX command'''.

|-
| 01:15
|To define''' '''a new '''command,''' we write '''\newcommand{command}{definition}''' at the beginning of the document.

|-
| 01:27
| Let us open the '''TeXWorks editor.'''

|-
| 01:34
| Pause the tutorial at this point.Download and unzip the files provided in the '''Code Files '''link below the player.

|-
| 01:43
| You will see some '''LaTeX''' code given in the file “'''newComm.tex'''” that you downloaded onto your machine.

|-
| 01:59
| We will copy and paste the first block of code from this file into our newly opened '''tex''' file.

|-
| 02:09
| Let’s try to understand the program.

|-
| 02:12
| The definition '''\newcommand{\bbr}{\mathbb R} '''means that '''\bbr '''is the '''newcommand.'''

|-
| 02:24
|And when used, it will typeset '''R '''in the '''mathbb font. '''

|-
| 02:31
| Note that the required '''packages '''are loaded in the preamble; in this case '''\usepackage{amsfonts}'''

|-
| 02:40
| So, instead of '''{\mathbb R},''' we can use '''\bbr '''within '''dollars '''while typesetting.

|-
|02:48
|Let us save the file as '''newComm.tex'''

|-
| 03:00
| On compilation, we get the '''pdf '''output. Observe the letter '''R '''in '''mathbb font.'''

|-
| 03:15
| Now, we will see '''newcommand''' with '''parameters.'''

|-
| 03:24
|It is typically defined as -

'''\newcommand{\command}[parameters]{definition}''

|-
|03:36
| Let’s open a new file in '''TeXWorks'''.

|-
| 03:45
| Now switch to our downloaded code file.

|-
|03:59
| We will copy the next block of code from our downloaded code file and paste it into our new '''teX''' file.

|-
| 04:07
| Let us understand the code now.

|-
|04:11
|We have '''\newcommand{\bb}[1]{\mathbb {#1}}'''before the '''begin document statement.'''

|-
| 04:22
| Here '''\bb''' is the '''command.'''

'''[1] '''means that the command has one parameter

|-
| 04:30
| '''\mathbb {#1}''' defines the '''command.'''
'''#1 '''means the first parameter.

|-
| 04:37
| Carefully observe the usage after '''\begin{document}'''

|-
| 04:42
|We use it within '''dollars '''because it contains '''math symbols.'''

|-
| 04:48
| '''\bb '''followed by the '''open brace '''and '''parameter '''and again we close the '''brace.'''

|-
| 04:58
| We have used it twice with '''R''' as the '''parameter''' in the first usage and '''Z''' as the '''parameter''' in the second usage.

|-
| 05:08
| Save the program as '''newCommP1.tex '''and compile it.

|-
| 05:28
| In the output, observe that the '''R''' and''' Z''' are in the '''mathbb''' or the '''blackboard font.'''

|-
| 05:40
| Next, let’s define a '''newcommand''' with '''2 parameters.'''

|-
| 05:46
| Open a new '''tex''' file.

|-
| 06:08
| We will copy and paste the next block of code from our downloaded file, as shown here.

|-
| 06:16
| Observe the line '''\newcommand{\add}[2]{ \left( #1 + #2 \right) }''' in the document.

|-
| 06:34
| This has been used as '''$\add{abc}{xyz}$''' Here in the definition, '''\add''' is the '''newcommand'''.

|-
| 06:47
|[2]''' indicates that it has '''2 parameters.''' '''{\left( #1+#2\right)}''' is the definition of the '''command.'''

|-
| 06:57
| '''#1''' for the first '''parameter''' and '''#2''' for the second '''parameter.'''

|-
|07:05
| #1''' and '''#2''' are replaced by the actual text '''{abc}''' and '''{xyz}''' in this case.

|-
| 07:16
| Let us save as '''newCommP2.tex '''and compile the '''tex''' file.

|-
| 07:32
| Observe the output.

Here the '''left''' and '''right parenthesis''' are added and a '''plus symbol''' is introduced between the first and second '''parameters.'''

|-
| 07:53
| Let’s now learn about the '''renewcommand'''.

|-
|07:59
| '''renewcommand''' is used to change or overwrite the existing '''command.'''

|-
|08:04
| The syntax for '''renewcommand''' is '''\renewcommand{command}{definition}''' It’s quite similar to '''newcommand.'''

|-
| 08:18
| Once again, we will open a new '''tex '''file.

|-
| 08:35
| We will copy and paste the last block of code from our downloaded file into our newly opened '''tex '''file.

|-
|08:45
| Let us understand the program now.

|-
| 08:48
| The definition '''\renewcommand{\S}{\mathcal {S}}''' redefines '''\S'''.

|-
|08:58
| '''\S '''normally produces the section symbol (§)

|-
|09:02
| whereas after redefining '''\S,''' produces '''S''' in '''Calligraphic font '''

|-
|09:11
| Note that the required package '''amsmath''' is preloaded. Also, we use '''\S''' within '''dollar symbols'''.

|-
| 09:26
| Let us now save the file as '''renew.tex''', compile it and see the output. We can see '''“S” '''in calligraphic font.

|-
| 09:49
| Come back to the '''tex '''file.

|-
| 09:59
| Note that replacing '''z '''for '''S '''in the '''renewcommand '''does not work.

|-
|10:06
| This is because there is no existing '''command''' defined as '''\z.'''

|-
|10:12
| Please use '''renewcommand''' only when you are very sure about what you are doing.

|-
| 10:26
|To summarise, we have learnt

'''newcommand'''

'''newcommand''' with '''parameters'''

'''renewcommand'''

|-
| 10:37
| Assignment

Create a new '''command \textbfit''' which will convert the given text into bold and italics.

|-
| 10:50
| The video at the following link summarises the Spoken Tutorial project.
Pls watch it.

|-
| 10:57
| The Spoken Tutorial Project Team : Conducts workshops using spoken tutorials and Gives certificates to those who pass an online test

|-
|11:07
| For more details, please write to us.

|-
| 11:11
| Spoken Tutorial Project is funded by NMEICT, MHRD, Government of India. More information on this Mission is available at this link.

|-
|11:24
| This is Ambika Vanchinathan signing off. Thanks for joining.

|}

LaTeX/C3/newcommand-in-LaTeX/English-timed - Revision history

Pratik kamble: Created page with "{| border="1" |- | '''Time''' | '''Narration''' |- | 00:02 | Welcome to the spoken tutorial on creating new '''commands '''in '''LaTeX'''. |- | 00:08 |This tutorial will hel..."